$height: 40px;

._message_container_ {
  position: fixed;
  top: -40px;
  left: 50%;
  opacity: 0;
  transform: translate(-50%, 0);
  background-color: #ffffff;
  color: #666666;
  border-radius: 10px;
  height: $height;
  line-height: $height;
  font-size: 14px;
  padding: 0 20px;
  box-shadow: 0 3px 20px rgba(136, 136, 136, 0.3);
  z-index: 50;

  &.show {
    transition: all 200ms;
    top: 40px;
    opacity: 1;
  }
}